“On the History of the Numerical Methods Solving the Drift Diffusion Model”, by Bernd Meinerzhagen, is an excellent review article on the history of TCAD simulation methods. It discusses the importance of that Scharfetter-Gummel discretization and the use of box integration methods. https://doi.org/10.33079/jomm.20030403 In addition, it contains reference to many of the numerical methods employed… Continue reading On the History of the Numerical Methods Solving the Drift Diffusion Model